Kitted sets of intake and exhaust valves designed to match the OE material specifications for drop-in compatibility (no need to reconfigure spring pack from OE specs) Valves are constructed of Tensilite Titanium and Black Diamond Stainless Steel (depending on application) All valves are one-piece forged and designed using Finite Element Analysis (F.E.A.) software Explicitly designed and engineered for each application to meet and exceed manufactures' specifications Made in the U.S.A.. VALVE KIT MSE PRO CRF450
